1/* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.layoutlib.bridge.bars; 18 19import com.android.ide.common.rendering.api.RenderResources; 20import com.android.ide.common.rendering.api.ResourceValue; 21import com.android.ide.common.rendering.api.SessionParams; 22import com.android.ide.common.rendering.api.StyleResourceValue; 23import com.android.layoutlib.bridge.android.BridgeContext; 24import com.android.layoutlib.bridge.impl.ResourceHelper; 25import com.android.resources.ResourceType; 26 27import android.annotation.NonNull; 28import android.annotation.Nullable; 29import android.content.Context; 30import android.graphics.drawable.Drawable; 31import android.view.ContextThemeWrapper; 32import android.view.LayoutInflater; 33import android.view.View; 34import android.widget.FrameLayout; 35 36import java.lang.reflect.InvocationTargetException; 37import java.lang.reflect.Method; 38 39 40/** 41 * Assumes that the AppCompat library is present in the project's classpath and creates an 42 * actionbar around it. 43 */ 44public class AppCompatActionBar extends BridgeActionBar { 45 46 private Object mWindowDecorActionBar; 47 private static final String WINDOW_ACTION_BAR_CLASS = "android.support.v7.internal.app.WindowDecorActionBar"; 48 private Class<?> mWindowActionBarClass; 49 50 /** 51 * Inflate the action bar and attach it to {@code parentView} 52 */ 53 public AppCompatActionBar(@NonNull BridgeContext context, @NonNull SessionParams params) { 54 super(context, params); 55 int contentRootId = context.getProjectResourceValue(ResourceType.ID, 56 "action_bar_activity_content", 0); 57 View contentView = getDecorContent().findViewById(contentRootId); 58 if (contentView != null) { 59 assert contentView instanceof FrameLayout; 60 setContentRoot((FrameLayout) contentView); 61 } else { 62 // Something went wrong. Create a new FrameLayout in the enclosing layout. 63 FrameLayout contentRoot = new FrameLayout(context); 64 setMatchParent(contentRoot); 65 if (mEnclosingLayout != null) { 66 mEnclosingLayout.addView(contentRoot); 67 } 68 setContentRoot(contentRoot); 69 } 70 try { 71 Class[] constructorParams = {View.class}; 72 Object[] constructorArgs = {getDecorContent()}; 73 mWindowDecorActionBar = params.getLayoutlibCallback().loadView(WINDOW_ACTION_BAR_CLASS, 74 constructorParams, constructorArgs); 75 76 mWindowActionBarClass = mWindowDecorActionBar == null ? null : 77 mWindowDecorActionBar.getClass(); 78 setupActionBar(); 79 } catch (Exception e) { 80 e.printStackTrace(); 81 } 82 } 83 84 @Override 85 protected ResourceValue getLayoutResource(BridgeContext context) { 86 // We always assume that the app has requested the action bar. 87 return context.getRenderResources().getProjectResource(ResourceType.LAYOUT, 88 "abc_screen_toolbar"); 89 } 90 91 @Override 92 protected LayoutInflater getInflater(BridgeContext context) { 93 // Other than the resource resolution part, the code has been taken from the support 94 // library. see code from line 269 onwards in 95 // https://android.googlesource.com/platform/frameworks/support/+/android-5.1.0_r1/v7/appcompat/src/android/support/v7/app/ActionBarActivityDelegateBase.java 96 Context themedContext = context; 97 RenderResources resources = context.getRenderResources(); 98 ResourceValue actionBarTheme = resources.findItemInTheme("actionBarTheme", false); 99 if (actionBarTheme != null) { 100 // resolve it, if needed. 101 actionBarTheme = resources.resolveResValue(actionBarTheme); 102 } 103 if (actionBarTheme instanceof StyleResourceValue) { 104 int styleId = context.getDynamicIdByStyle(((StyleResourceValue) actionBarTheme)); 105 if (styleId != 0) { 106 themedContext = new ContextThemeWrapper(context, styleId); 107 } 108 } 109 return LayoutInflater.from(themedContext); 110 } 111 112 @Override 113 protected void setTitle(CharSequence title) { 114 if (title != null && mWindowDecorActionBar != null) { 115 Method setTitle = getMethod(mWindowActionBarClass, "setTitle", CharSequence.class); 116 invoke(setTitle, mWindowDecorActionBar, title); 117 } 118 } 119 120 @Override 121 protected void setSubtitle(CharSequence subtitle) { 122 if (subtitle != null && mWindowDecorActionBar != null) { 123 Method setSubtitle = getMethod(mWindowActionBarClass, "setSubtitle", CharSequence.class); 124 invoke(setSubtitle, mWindowDecorActionBar, subtitle); 125 } 126 } 127 128 @Override 129 protected void setIcon(String icon) { 130 // Do this only if the action bar doesn't already have an icon. 131 if (icon != null && !icon.isEmpty() && mWindowDecorActionBar != null) { 132 if (invoke(getMethod(mWindowActionBarClass, "hasIcon"), mWindowDecorActionBar) 133 == Boolean.TRUE) { 134 Drawable iconDrawable = getDrawable(icon, false); 135 if (iconDrawable != null) { 136 Method setIcon = getMethod(mWindowActionBarClass, "setIcon", Drawable.class); 137 invoke(setIcon, mWindowDecorActionBar, iconDrawable); 138 } 139 } 140 } 141 } 142 143 @Override 144 protected void setHomeAsUp(boolean homeAsUp) { 145 if (mWindowDecorActionBar != null) { 146 Method setHomeAsUp = getMethod(mWindowActionBarClass, 147 "setDefaultDisplayHomeAsUpEnabled", boolean.class); 148 invoke(setHomeAsUp, mWindowDecorActionBar, homeAsUp); 149 } 150 } 151 152 @Override 153 public void createMenuPopup() { 154 // it's hard to add menus to appcompat's actionbar, since it'll use a lot of reflection. 155 // so we skip it for now. 156 } 157 158 @Nullable 159 private static Method getMethod(Class<?> owner, String name, Class<?>... parameterTypes) { 160 try { 161 return owner == null ? null : owner.getMethod(name, parameterTypes); 162 } catch (NoSuchMethodException e) { 163 e.printStackTrace(); 164 } 165 return null; 166 } 167 168 @Nullable 169 private static Object invoke(Method method, Object owner, Object... args) { 170 try { 171 return method == null ? null : method.invoke(owner, args); 172 } catch (InvocationTargetException e) { 173 e.printStackTrace(); 174 } catch (IllegalAccessException e) { 175 e.printStackTrace(); 176 } 177 return null; 178 } 179 180 // TODO: this is duplicated from FrameworkActionBarWrapper$WindowActionBarWrapper 181 @Nullable 182 private Drawable getDrawable(@NonNull String name, boolean isFramework) { 183 RenderResources res = mBridgeContext.getRenderResources(); 184 ResourceValue value = res.findResValue(name, isFramework); 185 value = res.resolveResValue(value); 186 if (value != null) { 187 return ResourceHelper.getDrawable(value, mBridgeContext); 188 } 189 return null; 190 } 191} 192